Create a log for each student
Create a log for each student. The data input into the log will be visible in the notes. Each log will be labeled by date. With this log, belt promotions can easily be updated. I had a customer pay by check the other day. So, I have no credit card information on him. I had to input into notes the date in which he made the payment by check. Some students are offered free trial days before signing membership agreements. I then input into notes the date of their first trial day. Some students drop out of class (parents) while their kids remain training. Then later decide to train again. This log will create a history of each student and/or customer/parent that interacts with the gym.